VOTE: what is the reason my ex unblocked me on Facebook?

ex cheated on me, lied about it for a month, dumped me, strung me along for months saying we would get back together, admitted to using me for sex and cheating on his new girlfriend with me, then texted me saying "get out of my life. I love her and not you. get over me. im blocking you". three months later, I notice he unblocked me. why did he do this?

things with the other girl didn't work out so he's back to see if he can use you again